The original Planetside was SUCH a great MMO, with huge battles, and then long stretches spent defending what you'd spent hours capturing.
There was a very simple RPG element with no fantasy spells or grinding quests, just a solid, believable (hah!) alien techno feel. Grabbing a Dropship to head into battle with a few mates was a real buzz, and the gameplay was perfectly balanced.
I made some good friends there, and it's such a pity that, while you can still Planetside now, it's practically dead (tho' for old time's sake I revisited a couple of days ago, and there were a coupla dozen people playing... but several years ago, you'd have battles with hundreds of players, brilliant!)
Let's hope No2 generates the same excitement!